[It makes part of Roxas feel a little better that Riku is so obviously affected by this; he's not the only one feeling it. But only a little better, because the rest of him feels worse.]

I don't know. His hair is darker, and his eyes are gold, but everything else is exactly the same. If it hadn't been obvious that he's a newcomer, I would have thought that...that Sora died and became one of those creatures in the dark. It's that similar.